Rolled bar for spike-blanks



(No Model.)

J. P. PERKINS.

ROLLED BAR FOR $1 1K]; BLANKS.

No 303,748. Patented Aug. 19, 1884.

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Illinois,

rrisn STATES ATENT Fries.

ROLLED BAR FOR SPlKE-BLARIKS.

SPECIFICATION forming part of Letters P atent No. 303,748, dated August19, 1884.

Application filed October as. 1853. (N0 model.)

To all whom it may concern.- V

is a perspective view of the same parts, show- Be it known that I, JAMESP. PERKINS, of ing the side which is to form the outer face of in thecountyof Cook and State of have invented certain new and usefulImprovements in Rolled Bars for Spike- Blanks; and I do hereby declarethat the following is a full, clear, and exact description thereof,reference being had to the accompanying drawings, and to the letters ofreference Chicago,

marked thereon, which form a part of this l specification.

This invention relates to the manufacture of that class of triangularrailroad-spikes which are generally triangular in crosssection and havea square upper portion adjacent to their heads.

It relates more particularly to an improved construction in rolledblanks or bars for forming a spike of the general character abovementioned; and it consists inthe matters hereinafter described, andpointed out in the claims.

'Ihe rolled bar above referred to is more especially intended for themanufacture of a triangular spike having a rectangular portion adjacentto the head thereof, and in which the rear or outer face of the spikeforms one face of the triangular part thereof, and the other two facesof said triangular part converge or approach each other centrally on theopposite or inner face, or that adjacent to the rail when the spike isdriven, such spike being similar to one described in Letters Patent No.236, 511 granted to me January 11, 1881; but such bar maybeused inmaking any form of spike having rectangular and triangular portions, asfirst above mentioned.

In the accompanying drawings, Figure 1 is a perspective viewillustrating the form of a rolled bar embodying my invention previous toits being cut into lengths to form blanks from which the spikes aremade, showing the side of the bar which is to form the inner face of thespike. Fig. 2 is a perspective view of the same, showing the side whichisto form the outer face of the spike. Fig. 3 is a perspective view of asection cut from the bar shown in Figs. 1 and 2, to form a blank for asingle spike, such view showing the side which is to form the inner faceof the spike. Fi 4 tion causes the elongation of the bar through therolls.

the spike.

9 is a transverse section of the bar shown in I Fig. 2, taken upon line1 g of said figure.

As shown in Figs. 1 and 2, A is a blank or bar from which the spikes areto be formed, said bar having, as shown in said figures, square portionsB, alternating with portions 0, which are of general triangular form incross-section, the combined length of the triangular part 0 and thesquare part B being substantially equal to that of a finished spike. Inthe manufacture of finished spikes from a bar prepared in the mannerdescribed, said bar is cut at or near the meeting points of the parts Band G, as indicated by the dotted lines b in Fig. 2, so as to formseparate blanks D,as illustrated in Figs. 3 and 4:, from each of which aspike is formed.

The bar A is preferably given the form described by being passed betweengrooved rollers constructed to give the desired form both to the squareand triangular port-ions thereof. In the usual process of manufacturethe bars are formed from a rod having in cross-section the general formof an egg-oval, as illustrated in Fig. 7, the grooves in the rollersused in forming the bars being generally rectangular in form, andprovided at suitable intervals with fillet-s adapted to givethe'required shape to the triangular portions of the bar. Thecrosssectional area of the bar before roll- .ing is preferably the sameor slightlyless than the cross-sectional area of the square portion ofthe rolled bar, and the reduction in crosssectional area of the bar inits triangular porin such portions during its passage In case, however,the bar before rolling has a less cross-sectional area than the squaredportions of the finished bar, a portion of the surplus metal in thetriangular portions will in this operation be carried forward, so as tomake the said square portions of full'size.

By rolling the bars A in the manner described, such bars may be producedwith little expense, and by cutting such bar into suitable lengths anumber of blanks are obtained, each of which is of the exact form of thefinished spike in its main or principal portion, and which only requiresthe formation of a head and point thereon in order to make a completedspike.

' The bar illustrated in the drawings is intended to be made into spikesgenerally similar to that shown and described in the patent above.referred to, and also to that illustrated in Figs. 5 and 6 of thedrawings, and for this purpose the faces 0 c c of the triangularportions 0 of the bar are formed with concaved or fluted faces in amannercorresponding with the form of the corresponding faces of thespike, which faces in the drawings are indicated by the same letters ofreference. The square portions B of the bar A and the triangularportions 0 thereof are preferably c011- nected by curved surfaces of theproper shape to give the desired form to the corresponding surfaces ofthe finished spike. This construction is illustrated in the drawings,inwhich the faces 0 of the spike are curved outwardly at their endsadjacent to the head of the spike, and the corresponding parts of thebar A are formed in a similar manner, as indicated at 1), Figs. 1, 2, 3,and 4E.

The curved surfaces joining the square and triangular portions of thebar may be alike at both ends of the triangular portion, as indicated atb and b in Figs. 1 and 2, and in dividing the bar A to form the blankssaid bars are preferably severed at the point at which the curvedsurfaces join the straight or parallel portions of the bar in thetriangular portions thereof, as indicated by the dotted lines b, abovereferred to, so that the lower and upper ends of the severed blanks Dpresent the appearance illustrated in Figs. 3 and 4. The form abovedescribed is used merely for convenience, however, and the form of thebar may change abruptly at the points at which the bar is severed informing blanks for separate spikes, as indicated at b at the right handin Figs. 1 and 2, the point at which the bar is severed in formingsingle. spike-blanks in such case being indicated by the dotted line bin Fig. 2. The more abrupt change of form in the baixat the juncture ofthe square and triangular parts thereof is usually preferred, for thereason that the blanks may be thereby severed close to the shoulders ofthe square parts, as indicated by the dotted line last referred to, anda comparatively small irregu- V larly-curved portion of metal willremain upon the upper end of the spike-blank to be crushed down informing the head thereon.

The heads and points of the spikes are finished by swaging machinery orin any other desired orpreferred manner, the heads being formed from theupper end of the square portion, and the irregular part leftthereon insevering the blanks, as indicated in Figs. 3

square portion, and the bar A is formed in a similar manner. Thecutting-edge e at the point of the spike is preferably made the fullwidth thereof, and is in the same plane with and practically forms acontinuation of the angle at the intersection of the faces 0 and c, theconcave face 0 of the spike being arranged to coincide at its deepestportion with the said edge at the point of the spike, as fully describedin the application mentioned. Such point may be readily formed from thetriangular end of the blank, an end having the general form describedbeing readily formed by the action of suitable swaging-dies.

An important advantage of the bar for forming spike-blanks described isthat the several features of construction in the triangular spikedescribed, with the exception of the head and point, being perfectlyformed upon said bar in the operation of rolling it, the necessity ofseparately forging or swaging each blank is avoided. The bar mentioned,by the operation described, may be continuously and rapidly produced,and said bar may be severed into spike-blanks which requirecomparatively little after finishing to convert them into completedspikes, so that spikes may be produced from said bar much more cheaplythan by any process of manufacture heretofore used.

I claim as my invention-- 1. A rolled bar from which. to formspikcblanks, consisting of alternating rectangular and triangularportions, substantially as described, and for the purposes set forth;

2. A rolled bar consisting of alternating rectangular and triangularportions, and in which one face of the triangular portions is in thesame plane with one of the faces of the rectangular portions,substantially as described.

3. A bar for spike-blanks, having alternating rectangular and triangularportions, the triangular portions being joined to the rectangularportions by curved faces, substantially as described, and for thepurposes set forth. 7

4. A bar for spike-blanks, having alternating rectangular portions B andtriangular portions 0, the latter having two concaved faces, 0, theremaining face c being located in the same plane with one face of therectangular portion, substantially as describec.

5. 'A bar for spike-blanks, having alternating rectangular andtriangular portions B and 0, one face of each triangular portion being 1my invention I affix my signature in presence in the same plane with aface of the reetanof two witnesses. gular portions, and all of the facesof the triangular parts being eoneaved transversely of JAMES S 5 thebar, substantially as described, and for the purposes set forth.

In testimony that I claim the foregoing as Witnesses:

O, CLARENCE POOLE, PETER J. ELLERT.

